You can take a look at what you can do with Mask 6 at 1080p in these presets. There are several settings you can adjust to make things brighter, for example, Bloom, Mask Gamma, Mask Strength, Gamma, CRT Gamma - In, CRT Gamma Out and Post-CRT Brightness. A touch of Halation can also go a long way.
These were all designed and tested on a 4K LG TV.
Feel free to look at them as well @nfp0.